End-clamping device



May "1o, 1927.

1,628,113 R. w. BURNS END CLAMPING DEVICE Filed July l. 1926 Y 3 Sheets-Sheet 2 INVENTOR ATTORNEYS May lo,

R. w.A BURNS END CLAMPING DEVICE Filed July l, 1926 3 Sheets-Sheet 3 INVENTORZ MM@ W Www,

' ATTORNEYS.

Patented May 10, 1927.

nutren ss:raras ,'Pafrisur carries..

ENI)*CILIAMPIlTGr` DEVICE.

rApplication filed July 1,

1t is common inthe artiot' wood clamping` where a plurality oil clamps are arranged in parallel relation to provide some clamping means ifor engaging the end edges ot such worl; as a door or other framedike structure at the same time, and the present invention relates to devices otthatsort.

The objects ot the invention are to secure an'end clampingdevice` the clamps of which arecapable ot'beinu elevated or moved up out ot the way to permit ready access to the main clamps t'or insertingl the work; to mount the .end-clamps, tor this purpose, upon means supported at the rear `oi the niaiu clamps or at their ends away 'from the operator so as to swingup anddown; to utilize vfor this purpose the hold-down rods of the main clamps, 0r `rods adapted to carry means lior pressing' downen the work being clamped; to enable the end-clamps at the` same time kto be adjustable and also renu fable; to enable squaring means to be applied and cooperate with the end-clamping means, and to obtain other advantages and results as may be brought out by the tollowing description.

Referring to the accompanying drawings, in which like characters of reference indicate the `same parts throughoutthe several views,

Figure l is a plan otra series o't bar clamps ot a clamp carrier, my imp-roved end-clamp*- ingr means being-shown applied thereto in connection with squaring means;

Figure 2 is a section across the main clamps, looking' toward their 'iront ends and taken on line 2 2, 1; j

F igure 3 .is `an end view with the clamp carrier rods in section online 3 3, Fig. 1;

Figure 4 is a perspective view looking down upon the outer end ot the `main clamp to which the squaring means is attached, trom lits inner' or opposite end:

.Figure 5 is a perspective view of the outer end of one oil? the othern'iainl clamps and its associated parts, looking down upon the same from its outer end; i

Figure (i is a perspective view of the adjustable jaw ot one o'l the main clamps, and

Figure 7 is a :fragmentary perspective view of parts ot the squarinn' means.

In the specific` embodiment of the invention shown in saiddrawings, 1, 2 and indicate. bar clamps of one of the transverse series of clamps of a clamp carrier, although it will be understood that the present 'inven Vsaid socket and rod upward.

1926. 'SeralNot 119,844.

tion is applicable 'to any plurality of clamps for engaging the side edges or' apiece ot like to mountingthem as one of thet-ransverse series of a-.clamp' carrier .as I have shown. Said clamps may furthermore be of any ordinaryk and lwell-known construction providing atfone end, lwhich is the outer end in fa clampcarrier, ahead 4 with a fixed jaw 5` and providing;l nearer the other end an adjustable jaw 6 adapted to be slid upon side bars `7, 8` by suitable means such as a draw bar S) betweensaid sidefbars and having' apertures 10 to engage said jaw and adapted to be moved longitudinally by a handled nut' `11 upon a screw 12 with which said draw bar 9 terminates at the head of thev clamp. At the other or inner end of the clamp a connection between the side bars 7, 8v, and in the particular clamp shown this connection takes the form of a spanner foot 13 adapted to engage spaced cross-rods 14, 14 such as are mounted at their opposite ends in links of the endless conveyor chains of aclamp carrier (not shown). Pivotally mounted in said spanner foot is a member 15 providing at its forward end a .seat or socket 16 for a removable rod 17 and having at its rear end 18 a spring 19 to normally swing This rod 17 projects forwardly above lthe clamp upon which it, is mountedand is adapted. to be pressed dow-n at its out-er end by the operator and `held parallel. to rthe clamp by a hook 2() uponthe head 4. Such a rod 17 has been used heretofore 'for `carrying,l means lor engaging thin work to hold it. down in place and prevent it springing or bulging' upwardly from the pressure uponvits edges, and to this extent theclamp as thus far described is Well-known and thought to need no further description.

The end-clamps of my invention extend transversely ot the vmain clamps 1, 2 and 3, above the same, and have their bars 21 mounted upon the hold-down rods 17, one end of' each bar carrying an adjustable downwardly projecting aw 22 which can be slid quickly into any desired position, and

at its other end ,a jaw 23 which is adapted to be moved toward the Work by` a screw 24. According to my invention the bars21 of the e11d-01a1nps .extend `beneath `the hold-down rods 17 of the main clamps and are supported thereon so that whenever said hold-down rods are released from their catches 29 and thrown upward by their springs 19 to afford access to the main clamps for putting the worlr therein, the said end-clamps are also carried upward out of the way with said hold-down rods. Preferably the bars 21 of the end-clamps are supported by the holddown rods 17 so as to permit adjust-ment of the end-clamps longitudinally of the holddown rods and also enable the hold-down rods to slide with their main clamps longitudinally of the end-clamps, which I have shown accomplished by slides on the helddown rods each comprising a block 25 havng an upper transverse aperture 26 to re- :eive a hold-down rod 17 and a lower transverse aperture 27 at right angles to the upper one (see Figure 5) to slidably receive an end-clamp bar 21., the block having at its upper part a set screw 28 to clamp it in position upon the hold-down rod. By this arrangement the main clamps are all adjustable with respect to one another to enable them to be moved nearer together or further apart to accommodate different pieces of work, and the end-clamps are similarly adjustable with respect to each other. Furthermore, upon releasing the hooks 2O t-he rods 17 are all swung upward, as shown in Figure 3, and carry with them the end clamps out of the way of the operator in taking out or putting in work. Obviously the end clamps may be mounted upon any suitable means supported at the rear ends of the main clamps so as to swing up and down, other than the hold-down rods shown, and may be made slidable in any suitable way other than by the .slides shown, the particular construction shown being only an illustrative one of many that could be employed.

ln applying the sqnaring means which have shown in the drawings, an outside one of the main clamps, as l, is provided upon the outside edges of its table or work-receiving surface with a longitudinally extending bar 29 riveted or otherwise suitably secured to the clamp with its inside edge formingl a shoulder to engage the work being clamped the jaw 23 of the end-clamps bearing against the opposite edge of the bar. Another bar il() similar to the bar 29 is arranged edgewise against the jaws 5 of the heads t of the main clamps and secured in right angular relation to the bar 29 by being riveted to a corner bracing plate 31 which is also riveted to the outer end of the bar 29 en the clamp 1. This coi-nm: plate 3l is most conveniently placed under the bars 29 and 80, upon the table or work-receiving` surface of the clamp 1, and, to properly level up the rest of said bars for this, a spacing strip 32 is put between the bar 29 and the clamp to which it is riveted, and a spacing strip 33 is riveted to the bottom of the bar 30 to rest upon the tables or work-receiving surfaces of the main clamps 2 and 3, this spacing strip 33 projecting beyond. its bar 30, as at 311-, so that the wort', will lie upon it well :is upon the corner plate 231. For the same reason the adjustable jaws 6 of the main clamps have each an angle 35 riveted by one flange to the face of the jaw so that its other flange lies slidably upon the work table or surface of the clamp and receives the marginal portion of the worlf'; and supports it at the same height as the opposite spacing strip projection 34: and corner plate 31.

It will be understood that the squaring means thus described dees not interfere in any way with sliding of the main clamps 2 and 3 with respect to main clamp 1, the bar 230 and spacing` strip 33 being attached only to clamp 1, through the corner plate 31 and bar 28, and being slidably free from clamps 2 and To retain said bar 30 in place against the worlr tables of the main clamps, their stationary jaws 5 are each provided with an angle 3G riveted by one llange to the face of the aw so that its other flange overlies the bar 30 as a guide, and to retain Said bar '39 cdgewise against thc faces of said stationary jaws of the main clamps the work table of the clamp farthest from the one having the corner plate 31 provided with a guide 87 consisting` of a piece of flat steel similar te that of which. the various spacing strips which have been described are made, said guide beingarranged transversely of the clamp and close to the bar 30 so that the latter cannet move edgewise away from the face of the jaw 5.

lVhile it is very useful in many cases to employ the squaring means with improved end clamps, obviously it is not necessary to do so and the end clamps can be used without any squaring means, in which case the guide 37 and angles 35 and 36 on the jaws are dispensed with. lWhen it is desired to remove the end clamps from the main clamps, as for work in which they are not .neededl` their supporting rods may be removed with them or said supporting rods may remain ou the main clamps to receive the usual pressure shoes (not shown) and serve in the ordinary capacity of hold-down rods. litany other variations may be made in the use of my improvements, and many moditications in the structure of parts and of the clamps to which they are applied, without departing); from the spirit and scope of the invention, and therefore I do not desire to be understood as limiting myself except as required by the following claims when construed in the light of the prior art.

Having thus described the invention, what l claim is:

1. rlhe combination with a plurality of main clamps adapted to engage the side edges ofa piece of Work, and rods on said main clamps adapted to swing each toward and away from the. work-receiving surface of its clamp, of an end-clamp mounted on said rods.

2. The combination with a pluralityl of main clamps adapted to engage the side edges ojl a piece of work, and rods on said main clamps adapted to swing each toward and away from the work-receiving surface of its clamp, ol," an end-clamp having its har mounted on said rods.

'.lhe combination with a plurality of main clamps adapted to engage the side edges of a piece of work, and rods on said main clamps adapted to swing each toward and away from the worlereceving surface of its clamp, of an end-clamp having its bar slidably mounted on said rods.

l. The combination with a plurality of main clamps adapted to engage the. side edges of a piece of work, and rods on said main clamps adapted to swing each toward and away from the work-receiving surface of its clamp, of an end-clamp having its bar mounted on said rods so as tomove longitudinally thereof. f

5. The combination with a plurality of main clamps adapted to engage the side edges of a piece of work and rods on said main clamps adapted to swing each toward and away from the work-receiving surface of its clamp of an end clamp having its bar mounted on said rods so` as to move7 transversely thereof.

6. The combination with a plurality of main clamps adapted to engage the side edges ol' a piece of` work, androds on said main clamps adapted to swing each toward and away from the work-receiving surface of its clamp, of an .end-clamp having its bar mounted on said rods so 4as to move both longitudinally and transversely thereof.

'i'. 'lhe combination with a plurality ofy main clamps adapted-fte engage the side` edges of a piece of werk and adjust-able to wor-k of different lengths, and rods on said main clamps adapted tojswing each` toward and away from the work-receiving' surface ofl its clamp, of an end-clamp mounted on saidI rods sov as to permit sliding. adjustment of the main clamps.

8. The combination with a plurality of nenn clamps adapted to engage the side. edges of a piece 'of work, and. rods 011 said main clamps adapted to swing each toward and away from the work-receiving surface of, its clamp, of an end-clamphaving its loar mounted en said rods so as to permit sliding.-A

upon it in adjusting the main clamps.

9. The combination with plurality of main clamps adapted to engage the side edges of a piece of work, and rods on said main clamps adapted to swing each toward and away from the work-receiving surface of its clamp, of an end-.clamp having its bar mounted on said rods so as to move longitudinally thereof, and means for preventing such longitudinal movement.

1 0. The combination with a plurality of main clamps adapted to engage the side edges of a piece of work, rods on said main clamps aaflapted to, swing each toward and away from the work-receiving surface of its clamp, and. slides onsaid rods each having' a seat transverse to its rod, of an end-clamp having its har slidaloly held in said transverse seats.

ll. The combination with a plurality of main clamps adapted to engage the side edges of a piece of work, rodsl on said main clangrps adapted to` swing each toward and away from the worlrfreceiving surface of its clamp,'and1 slides on said rods apertured to receive the same and each having another aperture transverse to its rod, of an end'- clamp having its bar slidably mounted inl said transverse apertures. l

l2. The combination with a plu 'ality of main clamps adapted to engage the side edges of a piece of work, and rods on said main clamps adapted to swing each, toward and away from the work-receiving surface, of its clamp, of an, end-clamp4 mounted on said rods,v and means for holding said rods and endeclamps swungaway from the workreceiving surfaces of the clamps.

i3. The combination, with a lplurality of main clamps adapted to engage the side edgesk of a piece of worlr, and rods on saidmain clamps adapted to swing each 'toward and. away from the work-receiving surface of its clamp, of; an endeclamp mounted on said rods, and means normally holding said rods and end-clamps swung away from the work-receiving surfaces of the clamps.-

la. The cemhinat-ion. with a plurality of] main clamps adapted to engage the side. edges of a piece of work, and rods on said main` clamps adapted to swing. each toward and awayfa'om the worlcreceiving surface of; its clamp,` of an end-clamp mountedon said` rods, meansnormally holding said rods and end-clamp. swung away from the workreceiving: surfaces of the clamps, and means pre-venting such swingingaway and holding the end-clamp in position to engage the work.

l5. The combination with a plurality of nrain clamps adapted' to engage the side edges of a piece of. work. and rods on said main clamps.. adapted to swing each toward and away from. the work-receiving surface of its clamp, of `an end-clampl having its bar slidahly mounted on said rods, means for locking said learagainst sliding on said rods, and means normally holding said rods and end-clamp swung away from the workreceiving surfaces of the clamps.

l. '.l`he combination with a plurality of main clamps havingjaws for the side edges of a piece of work, of a bar secured to one of said clamps lo engage an end edge of the piece of wol-li', and another bar secured lo said first-1mentioned bar in right angular relation thereto and lying contiguous to the faces of one set of j aws of the clamps to engage a side edge of the piece of work.

lT. The combination with a plurality of main clamps having jaws for the side edges of a piece of work, of a bar secured to one of said clamps to engag i in end edge of the piece of work, and another bar secured to said first-mentioned bar in right angular relation thereto and lying contiguous to the faces of one set of ja -fs of the clamps in slidable relation to other than the one having the said longitudinal bar.

18. The combination with a plurality of main clamps having aws for the side edges of a piece of work, of abar secured to one of said clamps to engage an end edge of the piece of vmrlr, another bar secured t-o said tirst-nientioned bar in right angular relation thereto and lying contiguous to the 'faces of one set of jaws of the clamps, and means for holding said transverse bar slid ably in place with respect to said jaws.

19. The combination with a plurality of main clamps having jaws for the side edges of a piece of worlr. of a bar secured longitudinally upon the work-receiving surface of one of said clamps to engage an end edge of the piece of work, and another bar secured to the said longitudinal bar in right angular relation thereto and lying contiguous to the faces of o-ne set of jaws of the clamps to engage a side edge of the piece of worlr.

20. rlhe combination with a plurality of main clamps having jaws for the side edges of a piece of work, of a bar secured longitudinally upon the work-receiving surface of one of said clamps to engage an end edge of the piece of work, and another bar secured to the same longitudinal bar in rightangular relation thereto and lying contiguous to the faces of one set of jaws of the clamps in slidable relation to other than the one having the said longitudinal bar.

2l. The combination of a plurality of main clamps, two bars in rigid permanent right angular relation to each other, one of said bars lying` against. the faces of the stationary aws of said main clamps and adapted to be clamped between the side edge of a piece of work and said stationary jaws and the other bar lying parallel to said main clamps, and end clamps adapted to clamp one end of the piece of work against the last-mentioned bar.

22. The combination with a plurality of main clamps having jaws for the side edges of a piece of work, of a bar secured longitudinally upon the work-receiving surface of one of said clamps to engage an end edge of the piece of work, another bar secured to the said longitudinal bar in right angular relation thereto and lying contiguous to the faces of one set of jaws of the clamps, and means for holding said transverse bar slid ably in place with respect to said jaws.

The combination with a plurality of main clamps having jaws for the side edges of a piece of work, of a bar in parallel relation to said clamps to engage the end edge of the piece of work, a bar extending transversely of the work-receiving surfaces of the clamps contiguous to the faces of one set of their jaws and secured to the said longitudinal bar in right angular relation thereto, and means upon one of the jaws contiguous to the transverse bar for holding said bar slidably in place with respect to the work-receivingl surfaces of the clamps.

2li. The combination set forth in claim 17 in which said means is an angle upon the face of one of the jaws.

25. The combination with a plurality of main clamps having jaws for the side edges of a piece of work, of a bar in parallel rela tion to said clamps to engage the end edge of the piece of work, a bar extending transversely of the work-receiving surfaces of the clamps contiguous to the faces of one set of their jaws and secured to the said longitudinal bar in right angular relation thereto, and means upon a clamp for holding said transverse bar slidably in place with respect to its contiguous jaws.

26. The combination set forth in claim 25 in which said means is a stop projecting from the vifork-ieceiifing surface of a clamp.

27. The combination with a plurality of main clamps having jaws for the side edges of a piece of work, of a bar secured longitudinally upon the work-receiving surface of one of said clamps to engage the end edge of the piece of work, a bar extending transversely of the work-receiving surfaces of the clamps contiguous to the faces of one set of their jaws, a. member beneath the adjacent ends of said bars across the angle between them and holding them in right angular relation, spacing strips beneath said bars at a distance from said member, and spacing means upon jaws of the main clamps opposite the spacing strip for the transverse bar.

28. The combination set forth in claim 27 in which the last-mentioned spacing means consists of an angle upon the face of each jaw.

RAYMOND W. BURNS. 

